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    <script>
        //柯里化思想

        //请实现以下效果
        function add (a, b, c) {
            return a + b + c
        }
        // console.log(add.length);

        const res = add(1, 2, 3) //6

        //要求声明一个curry函数，函数add经过curry函数的处理后，每次调用只能接收一个参数
        const curry = () => { }


        let addCurry = curry(add)

        // console.log(addCurry);
        const res2 = addCurry(1)(2)(3) //6

        console.log(res2);

   // 柯里化函数的构造方法
function curry (fn) {
  // 缓存除第一个参数的所有参数
  let args = [].slice.call(arguments, 1);  
  let _fn = function () {
    if (arguments.length === 0) {
      return fn.apply(this, args)
    } else {
      args.push(...arguments);
      return _fn
    }
  }
  return _fn
}
function add () {
  return [].reduce.call(arguments, (a, b) => a + b)
}
console.log(curry(add, 2)(1, 3, 4)(2, 3)(3)(4, 6)(7, 98)()) // 133
    </script>
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